Abstract
By using ABCD ray matrix theory and a random phase screen located near the source, analytic expression are developed for the mutual coherence function and scintillation index of a Gaussian-beam wave propagating through weak atmospheric turbulence in both the pupil plane and image plane of a receiving system. The phase screen model that we use is based on a previous double-pass analysis by the authors for analyzing speckle propagation from a rough target in a lidar system. In the present context, it serves as a model for a partially coherent Gaussian-beam wave that is currently used in laser communications. The effect of partial coherence (induced by a diffuser) on the scintillation index of the beam in the presence of weak atmospheric turbulence is investigated as a function of the correlation length of the diffuser and the propagation distance.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 98-109 |
| Number of pages | 12 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 4821 |
| DOIs | |
| State | Published - Dec 1 2002 |
| Externally published | Yes |
| Event | Free-Space Laser Communication and Laser Imaging II - Seattle, WA, United States Duration: Jul 9 2002 → Jul 11 2002 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering